Marine governor.



S. RUMOLINO.

MARINE GOVERNOR.

APPLIUA'rIon rILnD 21.1, 1912.

1,107,844, Patented Aug. 18, 1914 2 summe-spur 1.

Y www S. RUMLINO.

MARINE GOVERNOR.

APPLIGATION FILED v3.1, 1912.

1,107,844. Patented Aug. 18, 1911i 2 SHEETS-"SHEET 2.

WITNESSES INVENTOR ATTORNEY THE NURRIS PETERS ca, PHOro-L/THO.,WASHINGTON, D. c?.

SANTO RUMOLINO, 0F GENOA, ITALY.

MARINE GOVERNOR.

Specification of Letters Patent.

Application filed April 1, 1912. Serial No. 687,823.

To all whom it may concern Be it known that I, SANTO RUMOLINO, engineer,a subject of the King of Italy, residing at Genoa, Italy, have inventedcertain new and useful Improvements in Marine Governors, of which thefollowing is a specification.

The present invention relates to that kind of controlling devices forthe throttle valves of lsteam engines, especially marine engines, whichconsist of some electro-magnetic apparatus for operating the throttlevalve whenever the circuit is closed, which closure is brought about,either by the movements of a pendulum which swings longitudinally of thevessel whenever the vessel pitches, or else by the movements of a`overnor which is operated by the engine W en the number of revolutionsof said engine is increased. Devices of this character which haveheretofore been proposed have usually been subject to the operation thatany outer impulses which may temporarily break the contact'. with thependulum or with the governor,l

will as a matter of course, cause a frequent opening and closing of theelectric circuit, which is apt to give an irregular and unreliableoperation to the device. y

It is the purpose of the present invention to prevent, the furtherinfluencing of the electro-magnetic apparatus which operates thethrottle valve, by the pendulum or the governor, after the circuitV hasonce been closed, until said throttle valve is 'fully closed, therebyexactly limiting the closure of the throttle valve.

One form of this invention is shown in the drawings, in which;

Figure 1 shows the endulum for opening and closing the elect c circuitwhich operates the throttle valve, Fig. 2 shows the samependulum in theposition in which the circuit is closed through the same. Fig. 3 is adiagrammatica'l view showing the electrical connections between thethrottle valve and the pendulum arrangement which serves for a completeshutting olii' of the steam, and

also between said valve and the controlling device` which serves toprevent the engine from exceeding a definite glven speed. Figs. 4.-7illustrate the path of the electric circuit 'during different workingphases of the controlling device.

The pendulum device consists mainly of a weight M, secured to a rod Mwhich is pivoted at Q to a plate Q of insulating material, which plate Qis rigidl connected to the steamer; and consists urther of the metalliclink H, provided with a slot F and a bolt K for the urpose of limitingthe swin of the pendu um to such an extent as is a missible withoutclosing the circuit. The metallic link H is so connected to the plate Qthat the endulum may swin in the longitudinal pl)ane of the vessel. oththe link H and the pendulum are of electricall conductive material.

enever the contact Y on the endulum and the adjustable contact I on t elink H touch each other, through the Swingin of the pendulum caused bythe pitching of the vessel, the circuit containing ysaid link andpendulum will become closed. The electric current will act immediately,by means of a device hereinafter to be described, on the throttle valve,and closes it, whereby the enine will be stopped. In the samehmanner t eball governor R will act on the throttle valve, the circuit being closedby contacts being brought about by the movements of the governor arms.

The device for operating the throttle valve of the engine consistsprincipally of two electro-magnets G and G with movable armatures g andg', which simultaneously bring about the connection between the contactsl, 2, 3 and 4, 7 and 8, 9 and l0 for the electro-magnet G and betweenthe contacts 5 and 6 for the electro-magnet G; further of an electricmotor B with speed reducing gear consisting of a worm contained in acasing B and of a worm wheel B, 0n the shaft' of which is mounted aneccentric E which regulates the throttle valve D oi lthe engine bysliding the arm E' and rotating the lever E. The arm E serves at thesame time for operating a lever N of an electric switch C, which closesand breaks the electric circuit at the proper moment.

The manner of operation of the apparatus is as follows: As long ascontact y and contact I on the link are separated, the'armatures g and gof the electro-magnets G and G are in they position as shown in Fig. 3,z'. e. below, the motor is at a. standstill and the throttle valve isopen. Thereby the eccentric ,E, the lever N on the switch C and thelever E on the throttle valve D will have the position as shown in F' 3in dotted lines. While the field Win ing of the motor remains constantlyexcited,-be cause the current ows uninterruptedly Patented Aug. 1s,1914.

troni the positive. pole et the source of elec tricity over nl' andconductor l to the tield winding; and over the conductor ll and A backto the negative pole,on the other hand the armature circuit AV, l,armature et the motor nl", contact` 12B, contact 11, rim, contacts et-3,Will, i 'VI is interrupted between the contacts 11 and 13, so that themotor will be at rest (llig.` @n the other hand a short circuit throughthe armature of the meter has the 'following path: AV, contacts $`)-1(),nvm, contact 14, lever N, contact 13, 111V, aifniature of the motor, I,AV et). As soon as thecontact on the pendulum or the one ,controlled bythe ball` governor is closed, the electric circuitl will flow from thepositive pole ot the source ot electricity over AV to the electro-magnetG and baci; to the iie'g'ative pole over lll, Vl, the icontact on thependulum, V, ll and AVI., Hereby the winding` 'ot the el'ec'troniagnet Gwill become excited and its 'armature will be attracted, so that it`will make connection between the contacts 1 and and 7V and 8, while thecontacts 3-1 and 9&1() will `be at the same time interrupted (Fig. 5).There will. now be 'a Circuit from AV over l to the armature ot themotor and further over AI", contact 13, lever N, contact 12, ,All to thewinding of the electrc-niagnet G and over contacts 2 and 1, VH, AVI, tothe negative pole. This will cause the motor to start and i will makethe 4lever N rotate to the point where it gets out ot touch with thecontact 1.2, which means a closure ot the throttle` valve. Theelectro-magnet G which switched in betw-en the electro-inagnet Gr andthe Vmotor, prevents, that any separae` tions between the contacts onthe pendulum and on the link, which might be caused by any impulsesacting` on the contact of the pendulum would cause the 'electric currenttl'nou'gh the electro-magnet Gr to run by` 4The contacts 546 are notseparated again before the Alever 'N has been turned by the motor to theposition as fshowninrthe Fig. 3 in dotted lines, throttle valve shutsolif the steam from the engine. When the lever N has lett the contact12, the armature circuit AV, l, armature ot the motor Adv, contact 13,contact 12, liu, magnet G, contacts 2 1, Vil', AVI, will be interruptedbetween the contacts 12 and 13 (Fig. G). Now, however, the lever N `willin which position the idonei-4 touch the contact 15, whereby thearmature of the motor will be shortcircuited along the .followingvroute: AV, l, armature ot the motor All, contact 18, lever N, contact-15, AWT, contacts 8-7, 1V, rivm, All. This short circuit acts like anelectric brake and immediately stops the motor and keeps it in thatcondition as long as the connection between the conductors V and Vl isnot in terrupted on the pendulum, in other words, as long,` as themagnet G remains excited, so that its armature maintains the connectionbetween the contacts 7 and 8. Vth'en, however, the contacts on thependulum are broken, the current will no longer flow through the magnetGr, so that its armature will tall down, thereby` opening` 'the'c'ontacts 7 8 and 1%2, but closing the contacts 34 and 940. The circuitHows now from the positive pole over AV 'and I to the armature of themotor and over AIV, Contact 13, lever N, Contact 11, am, contacts '4;3,VH and AVI 'to the negative pole of the source of electricity (Fig. 7).The motor will therefore start again 'and run on until it has broughtVthe lever lil again into the position shown in dotted lines in Fig. 3,z'. e. until said lever N has lett the contact 11 and has arrived at the'Contact 14e. On 'this latter position ot the lever N the motor willstop again, because the armature circuit will become short-cireuitedover A", I, armature of the motor AI, contact 1 3, lever N, contact 14%,rivm, contacts 10-9, AV (Fig. il). vrlhe plates 16 and 17, which serveto malle the connectionsbetween the 'contacts 9 and 10, and 7 and 8respectively, are inA sulated as regardsthe armature 'g 'of theelectro-inagnet G. The interrupter l, which acts in the same 'manner onthe'circuit,`1n`a'y serve for suddenly 'shutting oil*l lthe steam fromvthe engine and may 'be provided 'at any suitable place.

Having thus described my invention what l claim and desire to secure byLetters Patent is: l

1. In a marine governor, the "combination ot a.. throttle valve, anelectric circuit including an electrically operated device for controlling' said valve, a switch operated `by a pendulum for closing saidcircuit, a second switch operated by a ball ,governor on the engine forclosing said circuit and an electromagnet `adapted to close a shunt`circuit in order to prevent the circuit operatingv the throttle valvewhen vonce closed from being;` i

opened again by the operation of either of said pendulum or governorcontrolling devices, l

2. ln a controlling; apparatus for "marine engines, the 'combinationwith "the throttle valve of an electric motor provided "withvconnections for opening' "closing said valve, a circuit including asource of elec tr1c1ty,"a's`w1tch 1n said circuit, a pendulum switchoperatedy by said valve controlling mechanism for opening the circuit tothe motor when the valve is closed and fOr short circuiting the armatureof the motor.

In testimon whereof I aix my signature in presence o two witnesses.

SANTO ,RUMOLINQ Witnesses AmnxANnRo Riom, ANGELO SOVERGINA.

Copies of this patent my be obtained for ve cents each, by addressingthe Commissioner oi Titan, Wulnlton, D. 0."

